Friedrich 26 error code

What it means

The outdoor radiator/heat-sink area is overheating or its sensing circuit is abnormal.

Urgency

Likely causes

1. Radiator sensor fails
2. Detection circuit of the sensor on the control panel fails

Homeowner fix

Turn the system off. Make sure the outdoor unit is not covered or blocked, but do not open the cabinet or electrical panels.

When to call a pro

Call a Friedrich-qualified technician if code 26 returns. Tell them the service manual lists overheated outdoor radiator.

Repair vs replace

Usually repairable as sensor/control or airflow diagnosis; compare major board repair with replacement on older systems.

• Friedrich Floating Air Pro 9,000 BTU R-454B 115V (FAHSW09A1C / FPHSR09A1C)

  Floating Air Pro

• Friedrich Floating Air Pro 9,000 BTU R-454B 208/230V (FAHFW09A3D / FPHSR09A3D)

  Floating Air Pro

• Friedrich Floating Air Pro 12,000 BTU R-454B 115V (FAHSW12A1C / FPHSR12A1C)

  Floating Air Pro

• Friedrich Floating Air Pro 12,000 BTU R-454B 208/230V (FAHFW12A3D / FPHSR12A3D)

  Floating Air Pro

For your technician

Official Friedrich indoor diagnostic table, PDF p.74: code 26 - overheated outdoor radiator; causes are failed radiator sensor or failed detection circuit on control panel. Page context: Friedrich maps this display to the Floating Air Pro line; source: Friedrich Ductless Floating Air Pro Single Zone Service Manual, R-454B Refrigerant, 96112000_00; display convention: match the twenty six marker exactly before comparing neighboring codes.

Which systems show it

Floating Air Pro

Related troubleshooting

Use the symptom guide alongside the exact display code if the unit is flashing, cycling, or showing comfort symptoms.

Related codes

Source

Next step